Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WB7RAD callsign genealogy
Currently held by Fitzthum, Don B
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by WB7RAD's current licensee, walking backwards.
- Fitzthum, Don BMTgranted 2020-09-21cancelled 2020-12-22
Successor callsigns
Callsigns held now by people who previously held WB7RAD.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WB7RAD, oldest first.
- CHRISTENSEN, STEVEN H OR2006-06-21 → cancelled 2018-09-12
- Fitzthum, Don B MT2020-12-22 active